JPS5650721A - Manufacture of long pipe by press die - Google Patents
Manufacture of long pipe by press dieInfo
- Publication number
- JPS5650721A JPS5650721A JP12483679A JP12483679A JPS5650721A JP S5650721 A JPS5650721 A JP S5650721A JP 12483679 A JP12483679 A JP 12483679A JP 12483679 A JP12483679 A JP 12483679A JP S5650721 A JPS5650721 A JP S5650721A
- Authority
- JP
- Japan
- Prior art keywords
- die
- blank
- type
- hereby
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To form the sheet blank successively from one end into O type through the U type section, and to manufacture various kinds of pipes in dissimilar diameters in a small lot, by closely arranging in series the U-forming die and the O- forming die in which the forming stroke is longitudinally changed.
CONSTITUTION: The die 1 is provided with the inclined zone 1a for a specified length from the inlet; hereby, the blank 4 is fed to the inlet under the flat sheet condition and is shaped into increasing curvature with advance into the depth of the die. Next, the blank 4 enters the horizontal die 1b and is into the U type; hereby, the U type part 4' is successively formed. Then, the blank enters the O-die 2; since the specified length of the upper die 21 is being prepared as the inclined surface 23, the forming stroke of the upper die 21 continuously changes; hereby, the bending of the edge of the blank is initiated, and the blank is formed round in front of the inclined die section 2a, and is gradually formed into the final O-shape by the horizontal die section 2b. The O-shape blank is sent to the welding pass and is welded.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12483679A JPS5650721A (en) | 1979-09-28 | 1979-09-28 | Manufacture of long pipe by press die |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12483679A JPS5650721A (en) | 1979-09-28 | 1979-09-28 | Manufacture of long pipe by press die |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5650721A true JPS5650721A (en) | 1981-05-08 |
JPS5726846B2 JPS5726846B2 (en) | 1982-06-07 |
Family
ID=14895286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12483679A Granted JPS5650721A (en) | 1979-09-28 | 1979-09-28 | Manufacture of long pipe by press die |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5650721A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS525467A (en) * | 1975-07-02 | 1977-01-17 | Shigeo Handa | Method of plating throughhholes opposite copper surfaces of printed circuit wiring board |
-
1979
- 1979-09-28 JP JP12483679A patent/JPS5650721A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS525467A (en) * | 1975-07-02 | 1977-01-17 | Shigeo Handa | Method of plating throughhholes opposite copper surfaces of printed circuit wiring board |
Also Published As
Publication number | Publication date |
---|---|
JPS5726846B2 (en) | 1982-06-07 |
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